Early Bronco EFI warm starting problem. Help please!

Reply Subscribe

Thread Tools

Search this Thread

Jul 13, 2011 | 10:46 PM

Jeremy LeLacheur

Thread Starter

Junior User

Joined: Apr 2006

Posts: 50

Likes: 0

Early Bronco EFI warm starting problem. Help please!

I just am getting my Bronco on the road. This is the first EFI I have ever installed. Everything has gone pretty smooth thanks to endless hours of reading here, over at Classic Broncos, and the Ford Fuel Injection website. The only real issue I seem to have so far is after the engine is up to operating temperature and I shut it off, it is difficult to start again unless I let it cool down for an hour or so. When its cold it fires right up. It rolls fine and the timing is set at 10 degrees with the spout unplugged. It really acts like it isn't getting fuel or at least thats what I think. Then when it does start it doesnt miss a beat. The block and heads are out of 1970 Bronco and the EFI is a bunch of parts I have got here and there. I have 24lb injectors and my MAF sensor is calibrated for them. The check engine light is not on and the engine runs well other than the starting issue.
I am not sure what to do to diagnose my starting issue and would appreciate any suggestions. I am sure I left out some valuable information so just let me know what I forgot. Thanks!

Jul 15, 2011 | 06:39 PM

jimbbski

Elder User

Joined: Nov 2009

Posts: 666

Likes: 0

From: Chicago area

You might want to check the fuel pressure. The pressure Reg. may maintaing pressure when the engine is running but the pressure may bleed down quickly after you shut it down and you may develop a vapor lock type condition. You may also need to check if any fuel lines are to close to a heat source such as exhaust pipe.

Does the FI system you are using have a return line or is it returnless?